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    Variable BACK_OVERSHOOT_IN_OUTConst

    BACK_OVERSHOOT_IN_OUT: number

    Overshoot used by backInOut: BACK_OVERSHOOT ยท 1.525.

    The in-out variant compresses each half into half the interval, which halves the visible overshoot; Penner's 1.525 factor restores it. Written as a derived constant so changing BACK_OVERSHOOT keeps the family consistent.